Hi similar error with me too. I was not present when XP tried to install....had to leave the pc DL overnight and seemed to have done the deed when I was asleep. Looks to me like it tried to install twice QUOTE 339.171: [dumpDownloadTask] Update.exe posting request file to download a total of 118378926 bytes (64100820 bytes in patches and 54278106 bytes in fallbacks) 339.187: [dumpDownloadTask] Returning 0xf200 339.187: dumpDownloadTask returned 0xf200 (more files to download) 346.859: UnRegisterSpuninstForRecovery, failed to delete SpRecoverCmdLine value, error 0x2 346.859: DoInstallation: Failed to unregistering spuninst.exe for recovery. 346.890: Service Pack 2 installation did not complete. 346.890: Update.exe extended error code = 0xf200 3.515: ================================================================================ 3.531: 2005/01/19 16:33:39.608 (local) 3.531: C:\WINDOWS\SoftwareDistribution\Download\S-1-5-18\8b5e9cdb91dddbb342695fbdc36fe0e4\update\update.exe (version 5.5.1005.0) 3.562: Service Pack started with following command line: /si /ParentInfo:4dd42369dd8aae49b32f0b2a5fc1b0ad 3.625: Return Value From OnACPower = 1 3.625: OnACPower returned value( 0x1 ) which is Equal To 0x1 3.640: Condition succeeded for section OnACPower.Section in Line 1 of PreRequisite 3.640: SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\WindowsFeatures is not Present 3.640: First Condition in A6Block.Section Succeeded 3.640: Condition succeeded for section A6Block.Section in Line 2 of PreRequisite 14.296: DoInstallation: CleanPFR failed: 0x2 14.343: SetProductTypes: InfProductBuildType=BuildType.Sel 14.390: SetAltOsLoaderPath: No section uses DirId 65701; done. 14.625: IncludeDirectoryIdFromInfSection: No DirId found for: DontRemoveOnUninst.DirId 14.656: Express: 118,378,926 bytes were downloaded. 155.250: [PatchFilesFromResponseBlob] returning STATUS_READY_TO_INSTALL 162.687: UnRegisterSpuninstForRecovery, failed to delete SpRecoverCmdLine value, error 0x2 162.687: DoInstallation: Failed to unregistering spuninst.exe for recovery. 162.843: Service Pack 2 installation did not complete. 162.843: Update.exe extended error code = 0xf201 UNQUOTE No idea at all what it means other than I waited about a day for it to DL to no avail. I DID have Spybot S&D active at the time with immunize. On the same level (I think) I also had SpywareBlaster activated too. Are the SP2 files still on my PC somewhere? Wouldn't mind disconnecting from net, rebooting without the spyware killers active and trying to install SP2 again. This is a fresh XP install of two days old on a new freshly formatted and partitioned HDD. Did run checkdisc and all seemed OK (thought results were only flashed up for about 1/2 second!) Only I was on the PC as administrator of something (you know..with max rights to tinker)